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                [Sdoi2008]红黑树(tree)                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div><span style="font-size: medium">　　红黑树是一类特殊的二叉搜索树，其中每个结点被染成红色或黑色。若将二叉搜索树结点中的空指针看作是指向一个空结点，则称这类空结点为二叉搜索树的前端结点。并规定所有前端结点的高度为-1。</span></div>
<div><span style="font-size: medium">　　一棵红黑树是满足下面&ldquo;红黑性质&rdquo;的染色二叉搜索树：</span></div>
<div><span style="font-size: medium">　　(1) 每个结点被染成红色或黑色；</span></div>
<div><span style="font-size: medium">　　(2) 每个前端结点为黑色结点；</span></div>
<div><span style="font-size: medium">　　(3) 任一红结点的子结点均为黑结点；</span></div>
<div><span style="font-size: medium">　　(4) 在从任一结点到其子孙前端结点的所有路径上具有相同的黑结点数。</span></div>
<div><span style="font-size: medium">　　从红黑树中任一结点x出发(不包括结点x)，到达一个前端结点的任意一条路径上的黑结点个数称为结点x的黑高度，记作bh(x)。红黑树的黑高度定义为其根结点的黑高度。</span></div>
<div><span style="font-size: medium">　　给定正整数N，试设计一个算法，计算出在所有含有N个结点的红黑树中，红色内结点个数的最小值和最大值。</span></div>
<div><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>输入格式</h3><p><div><span style="font-size: medium">　　输入共一个数N。</span></div>
<div><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>输出格式</h3><p><div>&nbsp;</div>
<div><span style="font-size: medium">　　输出共两行。</span></div>
<div><span style="font-size: medium">　　第一行为红色内结点个数的最小值，第二行为最大值。</span></div>
<div><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>样例输入</h3><pre>
8
 
</pre><hr/><h3>样例输出</h3><pre>
1
4
 
</pre><hr/><h3>提示</h3><p><p>对于 100% 的数据，1&le;N&le;5000</p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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